Tractor



FIG. 1 is a top perspective view of a tractor showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The oblique shade lines in the Figures show transparency and not surface ornamentation.

The grey shading in the Figures represents surface ornamentation. 

CLAIM The ornamental design for a tractor, as shown and described. 